The short answer
There is no Cartier product called the Santos 162370. That number comes from sellers, not from Cartier's catalog. Cartier's own references for the modern Santos carry letter prefixes, things like WSSA0018 or WGSA0021, so a bare six-digit string usually points to a factory batch code, an old case reference, or a listing ID someone made up. Treat it as a label on a listing, not as proof of anything.
Where the Santos actually sits
Cartier made the Santos in 1904 for the Brazilian aviator Alberto Santos-Dumont, and it is often described as one of the earliest purpose-built wristwatches. The line has run through several generations since: the Galbée, the Santos 100, the Santos-Dumont, and the current Santos de Cartier with its quick-release bracelet. Case sizes and metals vary a lot, which means "Santos" alone narrows very little. Two watches with the same name can differ by six millimeters in case width and thousands of dollars in price.
Why numbers like 162370 show up in replica listings
Replica sellers borrow the language of the watch trade because numbers look official. The number in a listing is usually one of four things:
- A factory batch code that changes without notice
- An internal SKU the seller uses to track orders
- An old or misread case reference copied from a forum post
- Something invented to make the page feel specific
None of that tells you what movement is inside, what the case is made of, or who assembled it. A number on a listing page carries no more weight than a number on a business card.
What you tend to receive
The photos on these pages are often genuine Cartier renders or shots of someone else's watch. What arrives is a different object. Plating thickness, movement type, crystal material, and bracelet finishing shift from batch to batch, and the same seller can ship two different watches in the same month. Resale value is close to zero. Service is a problem too: an independent watchmaker who recognizes the watch may decline to work on it, and Cartier will not touch it at all.
Legal and practical risk in the US
Counterfeit watches are illegal to import and to sell in the United States. Customs and Border Protection seizes shipments at the border, and a seizure letter does not come with a refund. Buying one for personal use carries lower exposure than selling, but the parcel can still be stopped, and the payment methods common in these deals offer almost no recourse. Trademark owners pursue sellers, and the penalties reach past the price of the watch.
How to tell a Santos from a fake
- Caseback engraving. Genuine engraving is crisp and shallow. Fakes cut deep and blurry, or they use the wrong font.
- Cabochon. The blue spinel in the crown sits flush and evenly set. On fakes it often rides high or wobbles.
- Dial print. Under a loupe, "Cartier" and "Swiss Made" stay sharp. Copies smear or use the wrong typeface.
- Bracelet screws. On the current model the screws are functional hardware. Fakes stamp the shape instead of cutting real threads.
- Reference and papers. Check the number against Cartier's own site. A six-digit string with no letter prefix should slow you down.
If you want the look
Several brands build square-cased watches with exposed screws for a fraction of a Santos, and those watches are legal, serviceable, and honest about what they are. Pre-owned genuine Santos models also exist across a wide price range. A 1990s Galbée in steel is not out of reach for many buyers. That route gets you the real dial, a real movement, and something you can actually hand down.